Within each school, girls will complete baseline assessment and be put into matched pairs based on age and sexual experience. Then they will be given a random number using a computer-based random number generator. Within each pair, the girl with the lowest number would be selected for the Teens and Toddlers programme and the girl with the highest number would be in the comparison group. The reserve pairs would be selected in a similar way, each pair would be given a random number. The two pairs with the lowest random numbers would become the reserve pairs, and the six pairs with the highest random numbers would form the main pairs for the evaluation. This randomisation process will be done using anonymised data remotely at the Offices of the National Centre for Social Research. Notification of girls' allocation will then be sent to the schools so that teachers can inform girls. Neither girls, teachers nor intervention providers can be blinded to allocation. Research data collection and analysis staff will be blinded to allocation.